JPH0343236Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention cleans the electrocoating paint adhering to the support roller attached to the L-shaped hanger of the conveyor on which the object to be coated is placed and immersed in the electrodeposition bath. This invention relates to a support roller cleaning device for an L-shaped hanger to be removed.

[Conventional technology]

In the coating line, objects to be coated are placed on hangers on a conveyor and transported through a pretreatment process, an electrodeposition process, and a washing process in this order.

These hangers include those formed into a gate shape (see JP-A-58-3996) and those formed into a C-shape (see JP-A-61-44197 and Japanese Utility Model Publication No. 62-44197).
(Refer to Publication No. 9329), but these are all caused by droplets of pre-treatment liquid or electrodeposited paint adhering to the hanger, or lubricating oil or dirt adhering to the conveyor rail falling onto the top surface of the object to be coated. There was a risk of paint defects occurring.

In other words, droplets of the pretreatment liquid adhering to the hanger on which the object is placed, lubricating oil adhering to the conveyor rail, etc. fall onto the top surface of the workpiece that has been pretreated with the pretreatment liquid. In this case, there is a risk that stains may occur in that area, resulting in a defective coating during electrodeposition coating.

In addition, if drops of electrocoated paint adhering to the hanger on which the object is placed fall onto the top surface of the object on which the electrodeposition film has been formed in the electrodeposition tank, a defective coating will occur. .

To prevent this, the hanger should be formed into an L-shape, the conveyor rail on which the hanger is suspended should be located away from above the object to be coated, and the pre-treatment liquid or electrocoating paint that may have adhered to the hanger should be removed. A possible method is to drop the material away from the object to be coated.

Here, since the L-shaped hanger has a structure in which the horizontal part on which the object to be coated is placed protrudes from the lower end of the vertical part whose upper end is supported by the conveyor rail, the horizontal part protrudes from the upper end of the vertical part as a fulcrum. A rotating force acts in the opposite direction.

For this reason, it is necessary to provide a support roller supporting the rotational force on the lower end side of the L-shaped hanger, and to install a guide rail for rotating the support roller along the conveyance line of the L-shaped hanger.

[Problem that the invention attempts to solve]

However, when the L-shaped hanger is immersed in the electrodeposition bath, electrocoating paint adheres to the support roller provided at the lower end of the L-shaped hanger, and this adhered paint solidifies after coming out of the electrodeposition bath. However, there is a problem in that the supporting roller cannot be rotated.

In other words, the electrodeposited paint that has entered the gap between the rotating shaft of the support roller and its bearing cannot be sufficiently washed away by showering in the washing process that is provided after the electrodeposition process, so it is left to dry as it is. This may cause the L-shaped hanger to rattle and prevent the support roller from smoothly rotating, causing the object to be coated on the hanger to fall or the guide rail to break.

In addition, the guide rail installed in the electrodeposition bath must have an insulating coating on its surface to insulate between the L-shaped hanger and the electrodeposition bath, but the guide rail must have a non-rotatable support roller. If contact occurs, the insulating coating may peel off due to strong friction.

Furthermore, if dried paint adheres to the support roller of an L-shaped hanger, paint scum will peel off from the support roller when the hanger is transported through the pretreatment process or electrodeposition process, and this will cause the pretreatment liquid and There is a risk that it will get mixed into the electrodeposition paint and cause spots on the surface of the object to be coated that will cause defects in the coating.

SUMMARY OF THE INVENTION An object of the present invention is to provide a support roller cleaning device that can thoroughly and effectively clean the support roller of an L-shaped hanger that has come out of the electrodeposition bath.

[Means for solving problems]

In order to achieve this objective, the present invention has developed an electroplating device that is attached to a support roller that is attached to an L-shaped hanger of a conveyor on which an object to be coated is placed and immersed in an electrodeposition bath, and that supports the rotational force acting on the hanger. A support roller cleaning device for cleaning and removing paint is provided, and the first invention is such that a guide rail that guides the support roller of the L-shaped hanger that has passed through an electrodeposition tank passes through a cleaning tank in which cleaning liquid is stored. A part of the guide rail laid in the cleaning tank is formed of a rotating member that contacts the support roller and forcibly rotates the support roller, The invention is characterized in that, instead of forming part of the guide rail by a rotating member, an ultrasonic transmitter that applies ultrasonic vibration to the support roller is installed in the cleaning tank.

[Effect]

According to the present invention, the support roller of the L-shaped hanger that has passed through the electrodeposition bath is guided by the guide rail and passes through the cleaning tank in which cleaning liquid is stored.

Inside this cleaning tank, there is a rotating member that comes into contact with the support roller guided by the guide rail and forcibly rotates the support roller in the cleaning solution. Not only the electro-deposited paint that has been removed, but also the electro-deposited paint that has gotten between the rotating shaft and the bearing is effectively wiped away.

In addition, when an ultrasonic transmitter is installed in the cleaning tank to apply ultrasonic vibrations to the support roller, the entire support roller vibrates and the electrocoated paint adhered to its surface is completely removed. , the support roller is thoroughly cleaned.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a front view showing an example of a support roller cleaning device according to the present invention, and FIG. 2 is a side view showing the main parts thereof.

The L-shaped hanger 1 of the conveyor C on which the object to be coated W is placed and immersed in the electrodeposition bath is suspended at the upper end side of the vertical part 1a from the conveyor rail 2, and has a support roller 3 at the lower end part of the vertical part 1a. is installed.

This support roller 3 receives the load of the object W to be coated placed on the horizontal part 1b of which the L-shaped hanger 1 projects from the lower end of the vertical part 1a, and the rotational force that acts in the opposite direction to the projecting direction of the horizontal part 1b is applied to the support roller 3. In order to support
The shaped hanger 1 is guided by coming into contact with a guide rail 4 laid along the conveyance path.

The guide rail 4 that guides the support roller 3 is laid so as to pass through a cleaning tank 5 installed at the rear of the electrodeposition tank, and a part of the guide rail 4 that is laid inside the cleaning tank 5 is fixed. The belt is cut to a length of , and a steel endless belt 6 is interposed in the cut portion.

The endless belt 6 is hooked in parallel to a pair of sprockets 8, 8 which are rotationally driven by a motor 7.
The support roller 3, which moves while contacting the endless belt 6, is forced to rotate at high speed.

In addition, as the cleaning liquid stored in the cleaning tank 5, for example, if the electrodeposition paint adhering to the support roller 3 is a cationic paint, the electrodeposition liquid discharged from the diaphragm electrode installed in the electrodeposition tank, acetic acid, formic acid, etc. etc. are used.

The support roller 3 of the L-shaped hanger 1 loaded with the object W to be coated and carried out from the electrodeposition tank is guided by the guide rail 4 and passes through the cleaning tank 5 provided at the rear stage of the electrodeposition tank. When the endless belt 6 is rotated in its passing direction, it comes into contact with the surface of the endless belt 6, which is forcibly rotated in the cleaning liquid stored in the cleaning tank 5, and the rotating shaft and bearing of the support roller 3 are connected to each other. Electrodeposition paint that has gotten into the crevices is thoroughly washed away with the cleaning solution.

Therefore, the L-shaped hanger 1 that has passed through the electrodeposition bath
It is possible to reliably prevent the electrodeposited paint adhering to the surface of the support roller 3 from solidifying and making the support roller 3 unable to rotate, thereby preventing accidents of the object W to be coated falling due to rattling of the L-shaped hanger 1. Accidents such as breakage of the guide rail 4 can be prevented.

In addition, the electrocoated paint that adheres to the support roller 3 and dries turns into paint scum and peels off into the pretreatment liquid and electrocoated paint, generating particles on the surface of the object W that cause coating defects. Things will go away.

In the above embodiment, the endless belt 6 is used as the rotating member for forcibly rotating the support roller 3, but a rotating disk may be used instead of the endless belt 6.

[Example] Next, FIG. 3 is a side view showing another example of the present invention, in which a guide rail 4 is installed along the bottom of the cleaning tank 5, in contact with the guide rail 4. An ultrasonic transmitter 9 is installed that applies ultrasonic vibration to the supported roller 3 being guided.

In this case, the support roller 3 vibrates in the cleaning liquid due to the ultrasonic waves transmitted from the ultrasonic transmitter 9.
Electrodeposition paint adhering to the surface is completely removed, and the entire support roller 3 is thoroughly cleaned.

[Effect of idea]

As described above, according to the present invention, the electrocoating paint adhering to the support roller of the L-shaped hanger that passes through the electrodeposition bath with the object to be coated solidifies, and the support roller becomes unable to rotate. This prevents the falling of objects to be coated due to rattling of the L-shaped hanger, damage to the guide rail, etc., as well as the prevention of electrodeposition that has adhered to the support roller and dried. It also has the excellent effect of preventing the paint from becoming paint scum and peeling off into the pretreatment liquid or electrocoating paint, thereby preventing the formation of spots on the surface of the object to be coated, which can cause coating defects.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one example of the present invention, FIG. 2 is a side view showing the main parts thereof, and FIG. 3 is a side view showing another example of the present invention. Explanation of symbols, W...Object to be coated, C...Conveyor,
1... L-shaped hanger, 3... Support roller, 4...
Guide rail, 5...Cleaning tank, 6...Endless belt (rotating member), 7...Motor, 9...Ultrasonic transmitter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Electrodeposition paint attached to a support roller that is attached to an L-shaped hanger of a conveyor on which objects to be coated are placed and immersed in an electrodeposition bath, and supports the rotational force acting on the hanger. A support roller cleaning device for cleaning and removing a cleaning solution, wherein a guide rail for guiding the support roller of the L-shaped hanger that has passed through an electrodeposition tank is laid so as to pass through a cleaning tank in which cleaning liquid is stored. A support roller cleaning device characterized in that a part of the guide rail installed in the cleaning tank is formed of a rotating member that contacts the support roller and forcibly rotates the support roller. (2) A support roller cleaning device that cleans and removes electrocoating paint adhering to the support roller, which is attached to the L-shaped hanger of the conveyor on which the object to be coated is placed and immersed in the electrodeposition bath, and supports the rotational force acting on the hanger. A guide rail for guiding the support roller of the L-shaped hanger that has passed through the electrodeposition tank is laid so as to pass through a cleaning tank in which cleaning liquid is stored, and the cleaning tank contains the A support roller cleaning device characterized in that an ultrasonic transmitter that applies ultrasonic vibration to the support roller is installed.